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Finding the Fourth Proportional to 20,402.70, 30,605.52 and 8,544.56

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Solution

The fourth proportional to 20,402.70, 30,605.52 and 8,544.56 is: 12,817.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.70 : 30,605.52 = 8,544.56 : x
  2. Step 2: Convert to fraction form
    20,402.70/30,605.52 = 8,544.56/x
  3. Step 3: Cross multiply
    20,402.70x = 30,605.52 × 8,544.56
  4. Step 4: Simplify right side
    20,402.70x = 261,510,701.97
  5. Step 5: Solve for x
    x = 261,510,701.97/20,402.70
  6. Step 6: Final answer
    x = 12,817.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.